【摘要】 以岩心观察、粒度分析、薄片鉴定、物性分析等为基础手段，结合录井和测井等资料对渤海湾盆地埕岛东部斜坡带主力含油层段（Ed₄和Ed₃²）沉积特征及对物性的影响进行了研究。结果表明：埕岛东部斜坡带目的层段沉积体以埕北低凸起为主要物源，同时存在东部和西南物源，发育湖泊背景下的湖底扇、近岸水下扇和扇三角洲相。湖底扇主要分布于第二坡折带附近，以中扇亚相辫状水道和中扇前缘微相为主，砂体连续性较强；近岸水下扇分布于断阶带附近，主要发育中扇辫状沟道微相，砂体连续性较弱；扇三角洲相主要微相类型为前缘水下辫状河道、河口坝和席状砂，发育南、北两个扇体，分别呈扇状和舌状展布。与孔隙度相比，储层渗透率更易受泥质含量和粒度中值的影响，分选系数与储层孔隙度和渗透率均呈负相关关系。扇三角洲前缘河口坝、席状砂物性最好、其次为扇三角洲前缘水下辫状河道、再次为湖底扇中扇辫状水道和近岸水下扇中扇辫状沟道，湖底扇中扇前缘物性相对最差。更多还原

【Abstract】 Based on core observation, grain size analysis, thin section identification, and physical property analysis, combined with well logging and logging data, the sedimentary characteristics of the main oil-bearing intervals, namely the fourth sub-member of Dongying formation and the second sand group of the third sub-member in the eastern slope zone of Chengdao in the Bohai Bay basin and its influence on physical properties were studied. The results show that the sedimentary body of the target interval on the east slope of Chengdao is mainly from the Chengbei low uplift, and there are both eastern and southwestern provenances. The sublacustrine fan, nearshore underwater fan and fan delta facies are developed. The sublacustrine fan is mainly distributed near the second slope break zone, dominated by the braided channel of the middle fan subfacies and the front microfacies of the middle fan, and the sand body has strong continuity. The nearshore underwater fan is distributed near the fault step zone, mainly developing the braided channel microfacies of the middle fan, and the continuity of the sand body is weak. The main microfacies of fan-delta facies are the front underwater braided channel, estuary bar and sheet sand. The south and north fan bodies are developed, which are fan-shaped and tongue-shaped respectively. Compared with porosity, reservoir permeability is more likely to be affected by mud content and median particle size, and the sorting coefficient has a negative correlation with reservoir porosity and permeability. The physical properties of the mouth bar and sheet sand microfacies in the front of the fan delta are the best, followed by the underwater braided channel microfacies, the braided channel microfacies in sublacustrine fan and the braided channel microfacies in nearshore underwater fan. The physical properties of the microfacies in the front of the middle fan of the sublacustrine fan are the worst.更多还原